Venting surgical cannula for providing gases to a patient

Abstract

A surgical cannula for providing insufflation gases to a surgical cavity of a patient (such as the pneumoperitoneum), allowing insertion of medical instruments into the surgical cavity through the cannula, and venting gases from the surgical cavity to the outside environment can include venting features including filters to more safely reduce the amount of undesirable materials such as smoke from reaching the outside environment.

1 . A surgical cannula for providing insufflation gases to a surgical cavity and venting gases from the surgical cavity, the cannula comprising:
 a cannula upper housing; and   an elongate shaft extending from the cannula upper housing;   wherein the cannula upper housing and the elongate shaft comprise a first lumen comprising a first lumen inlet and a first lumen outlet, the first lumen configured to receive the insufflation gases from an inlet in the cannula upper housing and deliver the insufflation gases from an outlet proximate a distal end of the elongate shaft and into the surgical cavity, wherein the first lumen inlet is in fluid communication with a source of the insufflation gases;   wherein the cannula upper housing and the elongate shaft comprise a second lumen comprising a second lumen inlet and a second lumen outlet, the second lumen configured to receive gases through the second lumen inlet from the surgical cavity and vent the gases through the second lumen outlet to outside the surgical cavity,   wherein the second lumen is in fluid communication with a venting element operably connected to the surgical cannula.   
     
     
         2 . The surgical cannula of  claim 1 , wherein the first lumen and the second lumen are at least partially nested with respect to each other. 
     
     
         3 . (canceled) 
     
     
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         5 . The surgical cannula of  claim 1 , wherein the first lumen is radially offset with respect to the second lumen. 
     
     
         6 . (canceled) 
     
     
         7 . (canceled) 
     
     
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         9 . The surgical cannula of  claim 1 , wherein the venting element is configured to provide passive venting created by a pressure differential with respect to the surgical cavity. 
     
     
         10 . (canceled) 
     
     
         11 . The surgical cannula of  claim 1 , wherein one of the first lumen or the second lumen comprise one or more positioning ribs configured to locate and/or retain an other of the first lumen or the second lumen. 
     
     
         12 . (canceled) 
     
     
         13 . (canceled) 
     
     
         14 . (canceled) 
     
     
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         16 . The surgical cannula of  claim 1 , wherein the second lumen comprises one of a semi-circular, crescent, or arcuate profile, and the first lumen comprises a circular profile, wherein the second lumen comprises a helical shape at least partially circumscribing the first lumen. 
     
     
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         22 . (canceled) 
     
     
         23 . (canceled) 
     
     
         24 . (canceled) 
     
     
         25 . (canceled) 
     
     
         26 . (canceled) 
     
     
         27 . (canceled) 
     
     
         28 . (canceled) 
     
     
         29 . (canceled) 
     
     
         30 . (canceled) 
     
     
         31 . A surgical cannula for providing insufflation gases to a surgical cavity and venting gases from the surgical cavity, the cannula comprising:
 a cannula upper housing; and   an elongate shaft extending from the cannula upper housing;   wherein the cannula upper housing and the elongate shaft comprise a lumen configured to receive the insufflation gases from an inlet in the cannula upper housing and deliver the insufflation gases proximate a distal end of the elongate shaft and into the surgical cavity, wherein a lumen inlet is in fluid communication with a source of the insufflation gases;   wherein the lumen is also configured to receive gases from the surgical cavity and vent the gases from the surgical cavity to outside the surgical cavity,   wherein the cannula further comprises a venting element in fluid communication with the lumen, the venting element comprising a filter configured to filter the gases from the surgical cavity before the gases from the surgical cavity are vented out of the surgical cannula.   
     
     
         32 . (canceled) 
     
     
         33 . The surgical cannula of  claim 31 , wherein the venting element is integrated into the lumen. 
     
     
         34 . The surgical cannula of  claim 31 , wherein the lumen comprises a wall extending partially axially along the lumen, the wall configured to divide the lumen into a first passage configured to deliver the insufflation gases to the surgical cavity and a second passage configured to vent the gases from the surgical cavity. 
     
     
         35 . (canceled) 
     
     
         36 . (canceled) 
     
     
         37 . The surgical cannula of  claim 34 , wherein the first passage is fluidly isolated from the second passage. 
     
     
         38 . (canceled) 
     
     
         39 . (canceled) 
     
     
         40 . (canceled) 
     
     
         41 . (canceled) 
     
     
         42 . (canceled) 
     
     
         43 . (canceled) 
     
     
         44 . (canceled) 
     
     
         45 . The surgical cannula of  claim 31 , wherein the venting element comprises an integrated heating element configured to heat a portion of the filter and prevent condensation with the filter. 
     
     
         46 . (canceled) 
     
     
         47 . A surgical cannula for providing insufflation gases to a surgical cavity and venting gases from the surgical cavity, the cannula comprising:
 a cannula upper housing; and   an elongate shaft extending from the cannula upper housing;   wherein the cannula upper housing and the elongate shaft comprise a first lumen comprising a first lumen inlet and a first lumen outlet, the first lumen configured to receive the insufflation gases from an inlet in the cannula upper housing and deliver the insufflation gases from an outlet proximate a distal end of the elongate shaft and into the surgical cavity, wherein the first lumen inlet is in fluid communication with a source of the insufflation gases,   wherein the cannula upper housing and the elongate shaft comprise a second lumen comprising a second lumen inlet and a second lumen outlet, the second lumen configured to receive gases through the second lumen inlet from the surgical cavity and vent the gases through the second lumen outlet to outside the surgical cavity,   wherein the second lumen is in fluid communication with a venting element operably connected to the surgical cannula,   wherein the second lumen is in fluid communication with a first filter and a second filter, the second filter spaced distally apart from the first filter.   
     
     
         48 . The surgical cannula of  claim 47 , wherein the first filter is contained within the venting element removably coupled to the cannula upper housing. 
     
     
         49 . The surgical cannula of  claim 47 , wherein the second filter is positioned distal to the first filter, and the second filter comprises a sidewall gases venting exit port. 
     
     
         50 . (canceled) 
     
     
         51 . A surgical cannula for providing insufflation gases to a surgical cavity and venting gases from the surgical cavity, the cannula comprising:
 a cannula upper housing; and   an elongate shaft extending from the cannula upper housing;   wherein the cannula upper housing and the elongate shaft comprise a first lumen comprising a first lumen inlet and a first lumen outlet, the first lumen configured to receive the insufflation gases from an inlet in the cannula upper housing and deliver the insufflation gases from an outlet proximate a distal end of the elongate shaft and into the surgical cavity, wherein the first lumen inlet is in fluid communication with a source of the insufflation gases; and   wherein the cannula upper housing and the elongate shaft comprise a second lumen comprising a second lumen inlet and a second lumen outlet, the second lumen configured to receive gases through the second lumen inlet from the surgical cavity and vent the gases through the second lumen outlet,   wherein the second lumen is in fluid communication with a venting element operably connected to the surgical cannula,   wherein the cannula further comprises a blower unit in fluid communication with the second lumen, the blower unit comprising a fan and a blower drive unit, the blower unit configured to suction the gases from the surgical cavity into the second lumen.   
     
     
         52 . (canceled) 
     
     
         53 . A multi-cannula surgical cannula system for providing insufflation gases to a surgical cavity and recirculating filtered insufflation gases back into the surgical cavity, the cannula system comprising:
 a first cannula comprising a first lumen configured to house a first medical instrument therethrough and a second lumen, a blower unit in fluid communication with the second lumen, and at least one filter in fluid communication with the second lumen, the blower unit comprising a fan and a blower drive unit, the blower unit configured to suction gases from the surgical cavity into the second lumen, the second lumen configured to receive the suctioned gases from the surgical cavity; and   a second cannula comprising a first lumen configured to house a second medical instrument therethrough and a second lumen, the second lumen of the second cannula configured to be in fluid communication with the second lumen of the first cannula via a conduit, the second lumen of the second cannula configured to recirculate the filtered insufflation gases back into the surgical cavity,   wherein at least one of the first cannula and the second cannula further comprise insufflation gas inlets connectable to a source of insufflation gases.   
     
     
         54 . A surgical cannula system for providing insufflation gases to a surgical cavity and recirculating filtered insufflation gases back into the surgical cavity, the cannula system comprising:
 a cannula comprising a first lumen configured to house a first medical instrument therethrough and a second lumen, a blower unit in fluid communication with the second lumen, and at least one filter in fluid communication with the second lumen, the blower unit comprising a fan and a blower drive unit, the blower unit configured to suction the gases from the surgical cavity into the second lumen, the second lumen configured to receive the suctioned gases from the surgical cavity; and   wherein the cannula further comprises a third lumen in communication with the second lumen of the first cannula via at the at least one filter, the third lumen configured to recirculate the filtered insufflation gases back into the surgical cavity,   wherein the cannula further comprise insufflation gas inlets connectable to a source of insufflation gases.   
     
     
         55 . A surgical cannula for providing insufflation gases to a surgical cavity and venting gases from the surgical cavity, the cannula comprising:
 a cannula upper housing; and   an elongate shaft extending from the cannula upper housing;   wherein the cannula upper housing and the elongate shaft comprise a first lumen comprising a first lumen inlet and a first lumen outlet, the first lumen configured to receive the insufflation gases from an inlet in the cannula upper housing and deliver the insufflation gases from an outlet proximate a distal end of the elongate shaft and into the surgical cavity, wherein the first lumen inlet is in fluid communication with a source of the insufflation gases; and   wherein the cannula upper housing and the elongate shaft comprise a second lumen comprising a second lumen inlet and a second lumen outlet, the second lumen configured to receive gases through the second lumen inlet from the surgical cavity and vent the gases through the second lumen outlet,   wherein the second lumen is in fluid communication with a venting element operably connected to the surgical cannula,   wherein the cannula further comprises a control operably connected to a seal proximate the second lumen outlet, wherein the control has an inactivated state and an activated state, wherein the control in the activated state causes the seal to open, allowing venting of the gases through the second lumen outlet.   
     
     
         56 . (canceled) 
     
     
         57 . A surgical cannula for providing insufflation gases to a surgical cavity and venting gases from the surgical cavity, the cannula comprising:
 a cannula upper housing; and   an elongate shaft extending from the cannula upper housing;   wherein the cannula upper housing and the elongate shaft comprise a first lumen comprising a first lumen inlet and a first lumen outlet, the first lumen configured to receive the insufflation gases from an inlet in the cannula upper housing and deliver the insufflation gases from an outlet proximate a distal end of the elongate shaft and into the surgical cavity, wherein the first lumen inlet is configured to be in fluid communication via a first conduit with a first source of the insufflation gases and via a second conduit to a second source of the insufflation gases,   wherein the cannula upper housing and the elongate shaft comprise a second lumen comprising a second lumen inlet and a second lumen outlet, the second lumen configured to receive gases through the second lumen inlet from the surgical cavity and vent the gases through the second lumen outlet,   wherein the second lumen is in fluid communication with a venting element operably connected to the surgical cannula,   wherein the second source of insufflation gases is a high-pressure insufflation gases source configured to be sufficient to create a pressure differential sufficient to cause smoke from the surgical cavity to be suctioned into the second lumen via a Venturi effect.   
     
     
         58 . A surgical cannula for providing insufflation gases to a surgical cavity and venting gases from the surgical cavity, the cannula comprising:
 a cannula upper housing; and   an elongate shaft extending from the cannula upper housing;   wherein the cannula upper housing and the elongate shaft comprise a first lumen comprising a first lumen inlet and a first lumen outlet, the first lumen configured to receive the insufflation gases from an inlet in the cannula upper housing and deliver the insufflation gases from an outlet proximate a distal end of the elongate shaft and into the surgical cavity, wherein the first lumen inlet is in fluid communication with a source of the insufflation gases; and   wherein the cannula upper housing and the elongate shaft comprise a second lumen comprising a second lumen inlet and a plurality of second lumen outlets, the second lumen configured to receive gases through the second lumen inlet from the surgical cavity and vent the gases through the plurality of second lumen outlets,   wherein the second lumen is in fluid communication with a venting element operably connected to the surgical cannula,   wherein the cannula upper housing is configured to be connected to a rotatable proximal cap comprising threads and a plurality of circumferentially-oriented slots, the slots configured to block or at least partially allow venting from the plurality of second lumen outlets upon rotation of the rotatable cap to control a venting rate of the gases.